通过温和共沉淀方法合成一系列锆掺杂的钛酸钙,并在850°C下焙烧3 h。采用扫描电镜(SEM)、X射线衍射(XRD)、紫外?可见漫反射光谱(DRS)和X射线光电子能谱(XPS)等手段对合成的锆掺杂的钛酸钙进行表征。XRD结果表明,锆掺杂钛酸钙以单一的钙钛矿相存在;紫外?可见漫反射光谱分析表明,锆掺杂钛酸钙在可见光区的吸收明显增强;XPS分析显示,在光催化剂表面存在2种类型的氧,即晶格氧和吸附氧。此外,对其光催化降解甲基橙的性能以及光电化学性能进行测试。结果表明,5% Zr(摩尔分数)掺杂钛酸钙具有最高光催化活性。晶格结构的改变、氧空穴的存在、光生电荷分离效率的提高都有利于提高锆掺杂的钛酸钙的光催化活性。
A series of Zr-doped CaTiO3 powders were prepared with the mild co-precipitation method and calcined at 850 °C for 3 h. The as-prepared Zr-doped CaTiO3 samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV?Vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectra (XPS). XRD result revealed the presence of single perovskite phase of CaTiO3. UV?Vis diffusive reflection spectra of Zr-doped CaTiO3 indicated that the absorbance obviously increased in the visible light irradiation. XPS analysis showed that two types of oxygen existed on the photocatalyst surface, including lattice oxygen and absorbed oxygen. Their photocatalytic activity in the case of the degradation of methyl orange in water and photoelectrochemical activity were also tested. The 5%Zr-doped (mole fraction) CaTiO3 sample showed the highest photocatalytic activity. The enhanced photocatalytic activity was ascribed to the change of the lattice structure, existence of oxygen vacancies and increase of the photogenerated charge separation efficiency.
参考文献
[1] | 伍水生;贾庆明;孙彦林;陕绍云;蒋丽红;王亚明.微波水热法合成花状纳米ZnO及其光催化活性[J].中国有色金属学报(英文版),2012(10):2465-2470. |
[2] | Zhang H;Zong RL;Zhao JC;Zhu YF.Dramatic visible photocatalytic degradation performances due to synergetic effect of TiO2 with PANI[J].Environmental Science & Technology: ES&T,200810(10):3803-3807. |
[3] | Hua Tong;Shuxin Ouyang;Yingpu Bi;Naoto Umezawa;Mitsutake Oshikiri;Jinhua Ye.Nano-photocatalytic Materials: Possibilities and Challenges[J].Advanced Materials,20122(2):229-251. |
[4] | Tongguang Xu;Liwu Zhang;Hanyun Cheng.Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,20113/4(3/4):382-387. |
[5] | Chang Hwan Kim;Gongshin Qi;Kevin Dahlberg;Wei Li.Strontium-Doped Perovskites Rival Platinum Catalysts for Treating NO_x in Simulated Diesel Exhaust[J].Science,2010Mar.26 TN.5973(Mar.26 TN.5973):1624-1627. |
[6] | Per Martin Rorvik;Tor Grande;Mari-Ann Einarsrud.One-Dimensional Nanostructures of Ferroelectric Perovskites[J].Advanced Materials,201135(35):4007-4034. |
[7] | Lili Zhang;Yulun Nie;Chun Hu.Enhanced Fenton degradation of Rhodamine B over nanoscaled Cu-doped LaTiO3 perovskite[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2012:418-424. |
[8] | Hiroshi Mizoguchi;Kazushige Ueda;Masahiro Orita;Sang-Chul Moon;Koichi Kajihara;Masahiro Hirano;Hideo Hosono.Decomposition of water by a CaTiO_3 photocatalyst under UV light irradiation[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,200215(15):2401-2406. |
[9] | Electronic structure and photocatalytic properties of copper-doped CaTiO_3[J].International journal of hydrogen energy,20107(7):2713. |
[10] | S. F. Wu;Y. Q. Zhu.Behavior of CaTiO3/Nano-CaO as a CO2 Reactive Adsorbent[J].Industrial & Engineering Chemistry Research,20106(6):2701-2706. |
[11] | Liu, HJ;Liu, GG;Zhou, QX.Preparation and characterization of Zr doped TiO2 nanotube arrays on the titanium sheet and their enhanced photocatalytic activity[J].Journal of Solid State Chemistry,200912(12):3238-3242. |
[12] | 罗强;蔡启舟;李欣蔚;潘振华;李玉洁;陈喜娣;严青松.ZrO2/TiO2复合光催化膜的微弧氧化法制备及表征[J].中国有色金属学报(英文版),2013(10):2945-2950. |
[13] | Sue-min Chang;Chieh-yao Hou;Pin-han Lo.Preparation of phosphated Zr-doped TiO2 exhibiting high photocatalytic activity through calcination of ligand-capped nanocrystals[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,20091/2(1/2):233-241. |
[14] | Kanattukara Vijayan Bineesh;Dong-Kyu Kim;Dae-Won Park.Synthesis and characterization of zirconium-doped mesoporous nano-crystalline TiO2[J].Nanoscale,20107(7):1222-1228. |
[15] | Bifen Gao;Tuti Mariana Lim;Dewi Puspitaningrum Subagio.Zr-doped TiO2 for enhanced photocatalytic degradation of bisphenol A[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,20101(1):107-115. |
[16] | L. Kumaresan;M. Mahalakshmi;M. Palanichamy.Synthesis, Characterization, and Photocatalytic Activity of Sr~(2+) Doped TiO2 Nanoplates[J].Industrial & Engineering Chemistry Research,20104(4):1480-1485. |
[17] | Bastl Z.;Senkevich AI.;Spirovova I.;Vrtilkova V..Angle-resolved core-level spectroscopy of Zr1Nb alloy oxidation by oxygen, water and hydrogen peroxide[J].Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films,20021(1):477-480. |
[18] | Wu, H.-H.;Deng, L.-X.;Wang, S.-R.;Zhu, B.-L.;Huang, W.-P.;Wu, S.-H.;Zhang, S.-M..The preparation and characterization of la doped TiO_2 nanotubes and their photocatalytic activity[J].Journal of Dispersion Science and Technology,201010/12(10/12):1311-1316. |
[19] | Jing LQ.;Sun XJ.;Shang J.;Cai WM.;Xu ZL..The surface properties and photocatalytic activities of ZnO ultrafine particles[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,20013/4(3/4):308-314. |
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